I wouldn't say paranoid. There is perhaps social pressure on her end trying to explain that she's shelling out big bucks for a now adult child who has already transfered schools and switched majors. Not that there's anything particulary wrong with switching majors and schools since statistics show that what one chooses to major in at 17 before starting college isn't the same as what one ends up graduating with at 22.
My mom was strict and an overbearing presence in my life and I was pressured to not transfer (was not even looking at BA either) although I was left with the shambles of debt. I digress.
It's tough to say what the frustration from her truly is. Art teachers are in demand typically, so at least that's something to fall back on?